Vehicle wheel washing device



April 11, 1961 J. VANI ErAL VEHICLE WHEEL WASHING DEVICE 8 Sheets-Sheet 1 Filed Aug. 27, 1957 April l1, 1961 J. VANI HAL VEHICLE WHEEL WASHING DEVICE 8 Sheets-Sheet 2 Filed Aug. 27, 1957 PIER fifa/"75655 April 11, 1951 J. vANl ErAL 2,978,718

VEHICLE WHEEL WASHING DEVICE Filed Aug. 27, 1957 8 Sheets-Sheet 3 April 11, 1961 J. VANI ETAL VEHICLE WHEEL WASHING DEVICE 8 Sheets-Sheet 4 Filed Aug. 27, 1957 April 11, 1961 J. VANI ETAL VEHICLE WHEEL WASHING DEVICE 8 sneetsneet `5 Filed Aug. 27, 1957 April 11, 1961 J. VANI UAL VEHICLE WHEEL WASHING DEVICE 8 Sheets-Sheet 6 Filed Aug. 27, 1957 www! .NNN

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April 11, 1961 J. VANI ETM.

VEHICLE WHEEL WASHING DEVICE 8 Sheets-Sheet 7 Filed Aug. 2'?, 1957 NWN Q MZ 0 M Nm N y April 1l, 1961 J. VANI EI'AL VEHICLE WHEEL WASHING DEVICE 8 Sheets-Sheet 8 Filed Aug. 27, 1957 VEHICLE WEEL WASHING DEVCE .lames Vani, Midlothian, and Albert l. Malpede, Chicago,

Ill., assignors to Service Metal Fabricators, Inc., a corporation of Illinois Fried Aug. 27, 1957, ser. No. 680,602

s claims. (ci. is-zn This invention relates to vehicle washing devices and, more specifically, to devices which are particularly wel-l adapted for washing wheels and tires of vehicles as the vehicles are moved through a washing unit. This application is a continuation-in-part of our co-pending application, Serial No. 592,344, now abandoned, filed lune 19, 1956.

A primary object of our invention is to afford a novel washer for washing wheels of automobiles, trucks, busses, and like vehicles.

Another object of our invention is to provide a novel washer of the aforementioned type which is effective to etiiciently Wash the wheels and tires of such vehicles as the latter advance through a vehicle washing unit.

Another object of our invention is to enable a novel washer of the aforementioned type to be moved along with such -a vehicle, and to be operatedin a novel and expeditious manner.

Another object of our invention is vto enable a novel washer of the aforementioned type to wash each wheel of such a vehicle as the wheels are successively advanced through a vehicle washing unit.

Yet another object of our invention is to afford a novel washer of the -aforementioned type which is effective to apply steam and water to the sides of the wheels and tires of such a vehicle, and to scrub the wheels and tires in a novel and expeditious manner.

A further object of our invention is to afford a novel washer of the aforementioned type which maybe reciprocated in a novel and expeditious manner along the path of travel of such a vehicle to be washed.

Another object is to enable a novel washer of the aforementioned type to 4be moved along with such a vehicle through an ecient wheel and tire washing operation and to be' automatically and quickly returned to starting position to repeat the operation on the next successive wheel to be washed.

Another object of our invention is to enable a novel wheel washer to be pneumatically and electrically controlled in a novel and expeditious manner.

Another object of our invention is'to afford a novel washer of the aforementioned type which may be readily i t practical andN etiicient ments of the invention embodying the same or equivalent principles may be used and structural 'changes may be made as desired by those skilled in the art without departing from the present invention and the purviewk of the appended claims.

ln the drawings:

2,978,7l8 Patented Apr. 1l, i961 ICC Fig. l is a top plan view of a wheel washer embodying the principles of ourl inventon;

Fig. 2 is an end elevational view of the wheel washer shown in Fig. 1;

Fig. 3 is a side elevational view of the wheel washer shown in Fig. l;

Fig. 4 is a top plan view of one of the carriages of the wheel washer unit shown in Fig. 1, with the top cover thereof removed;

Fig. 4A is a detail sectional view taken substantially along the line 4A--4A in Fig. 4;

Fig. 5 is a detail sectional view taken substantially along the line 5-5 in Fig. 4;

Fig. 6 is a detail sectional view taken substantially along the line `6 6 in Fig. l;

Fig. 7 is a detail sectional view taken substantially along the line 7-7 in Fig. 6;

Fig. 8 is a detail sectional view taken substantially along the line 8 8 in Fig. 1;

Fig. 9 is a top plan view of the portion of the device shown in Fig. 8;

Fig. 10 is adetail sectional view taken substantially along the line lil-10` in Fig. 4; Y

Fig. l1 is a diagrammatic showing of the pneumatic control system embodied in the device shown in Fig. 1;

Fig. l2 isa diagrammatic showing of the electrical control system of the device shown in Fig. l;

Fig. 13 is a plan view, similar to Fig. 4, of another embodiment of the invention;

Fig. 14 is a simplified vsectional view taken along lin 14-14 in Fig. 13; and

Fig. l5 is a schematic diagram, similar to Fig. ll, of a pneumatic control system for the embodiment of Fig. 13.

In the drawings, a wheel washing device Ztl, embodying the principles of our invention, is shown in varying detail inFigs. 1-12 to illustrate one embodiment of our invention. l f

The wheel washer 20 embodies in general, two carriages 22 and 23 mounted in parallel, horizontally spaced relation to each other on two tracks 24 andl 25, respectively. The tracks 24 and Z5 each embody two parallel rails 24a and 24h, and 25a andZSb, respectively, 'and each ofthe carriages has a pair of front wheels 27 and a pair of rear wheels 28 mounted thereon for movement along the railsof the'tracks 24 and 25,respectively, Fig. l. n

In a normal wheel washing operation of our novel washer 20, an automobile, orlike vehicle yto be washed, Yis moved forwardly from left to right, as viewed in'Fig. l, between the tracks 24 and 25, 'As the front wheels of the vehicle advance. between the` tracks 24 and 25, the

carriages 22 and 25 are-advanced therewith, and that wheel which is adjacent tothe respective one of the `carriages is sprayed with steam and water from nozzles carried Iby that carriage, 'and is also scrubbed by a brush carried by thatcarriage. When the ,carriages 22 and 23 `reach the front endof the tracks 24 and 25, they are automatically returnedftofthe rear endfthereof in positionto again be advancedV with the rear wheels ofthe vehicle through another' washing cycle of'` operation.,

l bythe same-reference numbers.

- `tion box 34 mountedonithe louterzupperY el gfportion ,of z

'ally vopera-ble valvesl, 35,2, and 33pandan Each-ofthejcarriageszz and 23 embodies-threefmanu- 'V p electriealzjunc'.-

the housing 26 the respective carriage 22 or 23, Figs.

1 and 3. The valves 31, 32 and 33, respectively, on the two carriages 22 and 23 are connected to each other by substantially inverted U-shapedwater conduits 31a, steam conduits 32a, and air conduits 33a, respectively, and the electrical junction boxes 34 on the two carriages 22 and 23 are connected together by a substantially inverted U-shaped electrical conduit 34a,.Figs. l and 3. The conduits 31a-34a may be grouped relatively closely together to `form an arch-way through which the vehicle to be washed may pass, Figs. 1 and 2.

The conduits 31a-31a may be of any suitable construction such as, for example, suitablepipes, and may be connected to a suitable source of water, steam, and air, respectively lby flexible hoses 31C, 32e, and 33e connected thereto by T-fittings 31d, 32d and 33d, respectively, Fig. l. l

A T-titting 34d is likewise embodied in the conduit 34a above and forward of the carriage 22, Fig. l, and a conduit 35a extends therefrom into a fuse box 35 disposed in depending relation thereto, Fig. 2.

Each of the carriages 22 and 23 also embodies an arm 36 which is normally disposed in position to project inwardly toward the other of the carriages 22 and 23 as shown in solid lines in Fig. l. The tracks 24 and 25 are so disposed relative to each other, and the arms 36 on the carriages 22 and 23 lare of such length that when a vehicle such as the vehicle V, Fig. 2, is moved forwardly between the tracks 24 and 25, from left to right as viewed in Fig. 1, the front wheels lF of the vehicle opposite end portions of the air cylinder 45 are connected by suitable air lines 47 and 48 to a control valve 49, Figs. 4 and 11.

When the manually operable valve 33 is open, air is fed at all times to the control valve 49 from the air conduit 33a through the valve 33, a conduit 51, an air iilter 52, a conduit 53, a high pressure air regulator 54, a conduit 55, an air line oiler 56, a conduit 57, one leg of a T-tting 58, and a conduit 59. Each of the control valves 49 embodies a downwardly projecting plunger 49a, Figs. 6 and 7, on the lower end portion of which is pivotally mounted a rearwardly extending arm 49b. The arm 49b is pivotally mounted at its longitudinal center on a bracket 49C which is lattached to and projects downwardly from the housing of the valve 49, and a roller 49d is rotatably mounted on the rear end portion of the arm 49h. When the plunger 49a is disposed in lowermost position in thevalve 49, as shown in solid lines in Fig. 6, air is fed from the conduit 59, attached to the inlet of the Valve 49, through the valve 49 and the line 47 into the rear end portion of the air cylinder 45 to thereby move the plunger a into full outwardly projecting position and pivot the arm 36 into normal outwardly projecting position, shown in solid lines in Fig. 1. When the plunger 49a of the valve 49 is retracted into the housing thereof into uppermost position as shown in broken lines in Fig. 6, air is fed from the line 59 through I the valve 49, and the line 48, into the front end portionfirst engage the arms 36 and push the carriages 22 and 23 from their normal at rest position at the rearends 38 of the tracks 24 and 25 toward the front ends 39 thereof. When the carriages reach Vthe front` ends 39 of the tracks 24 and 25 the arms 36 are folded inwardly, in a forward direction, into a position substantially parallel to the tracks 24 and 25 past the front wheels F into normal at rest position at the rear ends 38 of the tracks 24 and 25 as will be discussed in greater detail presently.

Each of the carriages 22 and 23 has a water nozzle Slb, two steam nozzles 32b and 32s, and a brush 41 projecting inwardly from the housing 26 thereof toward the other one of the carriages 22 or 23, Fig. l. As the carriages 22 and 23 are moved forwardly along the tracks 24 and 25 by wheels, such yas the wheels F, of a vehicle, water is fed from the conduit 31a through nozzles 31b on the carriages 22v and 23 directly against the side of the wheel pushing on the arm 36 of a respective one of the carriages 22 and 23. At the same time, steam is fed from the conduit 32a through nozzles 32b and 32s on the carriages 22 and 23 directly against the aforementioned wheels of the vehicle, and the brushes 41 on the carriages 22 and 23 arepressed against the side walls of the tires of the aforementioned wheels and are rotated thereagainst to thereby scour and clean the side walls. The control ofthe flow of steam and water, and the control of the application of the brushes 41 against the wheels of thevehicleto be washed are eiected by mechanism embodied in our novel wheel washer 20 which will now be discussed in greater detail. Y

It will be remembered that the Vcarriages 22 and 23 are mirror-images ofeach other, as are the tracks-24 and 25, and hence it will only be necessary to discuss, in detail, the construction and operation of one ofthe carriages 22 and 23, and one of the tracks 24 and 25.

The arm 36 on the carriage-22 embodies an elongated roller 36a rotatably mounted on one-end portion of a shaft 36b,.F,igs. 4 and l0, the other end portion'of which is pivotally'moun'tedby a yoke 36C and a pin 36d on the outer end portion of a supporting bracket 36e which is mounted in and projectsvr outwardly from the housing 26 ofthe carriage 22. AnV arm v43 Vis attached to and j projectsforwardly-from the" yokef=36c, and is pivotally connected at its frontend portion to the piston 45a of 'an air-'cylinder 45 mounted vwithin the housing 22a. The

of the air cylinder 45 to thereby retract the plunger 45a and swing the arm 36 into "forwardly folded position. wherein it is disposed in substantially parallel relation to the track 24, as shown in broken lines in Fig. l.

As a vehicle is being moved through our novel wheel washing device 20, the lwheels of the vehicle engage the outwardly projecting arms 36 on the carriages 22 and move the carriages forwardly. along the tracks 24 and 25. During this movement of the carriages 22 and 23 the plungers 49a of the valves 49 are disposedY in lowerrnost position so that the roller 49d of each valve 49 is disposed in a position wherein it rides over the upper edge of a cam rail 61 mounted on the rail 24a and 25a of the :tracks 24 and 25, respectively, Figs. 1 and 6. As the carriages 22 and 23 continue to advance, the rollers 49d engage the rear end portion of cam rails 63 mounted on the rails 24a and 25a between the cam rails 61 and the front end 39 of the track 24, Figs. 1 and 6. AAs each roller. 49d advances along the cam rail63 it is forced downwardly thereby into'the position shown in broken lines in Fig. 6 to thereby push the plungers 49a upwardly into uppermost position and actuate the valves 49 so' that air is then fed through the lines 48 into the front end portion of the cylinders 4S to retract the plungers 45al and fold the rollers 36 forwardly into substantially parallel relation to the track'24, as shown in broken lines in Fig. l. With the rollers 36 disposed in this position, the carriages 22 and 23*l may be moved rearwardly alongthetracks 24 and 25 toward its normal at rest position at the front end 38.0f the tracks 24 and 25 by lmechanism which will be discussed in greater detail presently.

.The mounting bracket V36e is pivotally mounted by a pin 65, Fig. 4 for pivotal movement in a horizontal direction in the housing 26 between the position shown in solid :linesin Fig. .4 and the position shown in broken lines therein. A control valve 67 having a plunger 67a projecting rearwardly therefrom is mounted in the front inner corner lof the housing 22a forwardly of the bracket 36e in position wherein the rear end portion ofthe plunger 67a is disposed in abutting engagement with the front vand -the bracket 36e are disposed in the positionl shown in solid lines in Fig. 4, wherein theplunger 67/- is disposed in rearwardmost projecting position. When a vehicle such as the vehicle V, Fig. 2, moves intov engagement with the roller 36 and presses forwardly thereon to thereby move the carriage 2.2 forwardly along the track 24, the forward pressure of the vehicle on the arm 36 is eiective to pivot the arm 36 and the bracket 36e, as a unit, around the pin 65 into a position wherein the arm 36 and the inner end portion of the bracket 36e are disposed in slightly forwardly projecting position as shown in broken lines in Fig. 4. When the bracket 36e is disposed in this latter position it is effective to press the plunger 67a into innermost position in the valve 67 as shown in broken lines in Fig. 4. As will be discussed in greater detail presently, the valve 67 is effective to control other mechanism in the carriage 22, including the positioning of the brush 41, the flow of steam and water through the nozzles 32h- 32s, and 31h, and the mechanism for returning the carriage 22 to starting position.

It will be remembered that the air conduit 33a is connected through the valve 33, filter 52, regulator 54, and oiler 56, and conduit lines 51, 53,55 and 57, to a T-tting 58, one leg of which is connected by the conduit 59 to the control valve 49, which controls the outwardly projecting positioning of the arm 36, as previously discussed. The other leg of the T-itting 58 is connected by a conduit 71 to one side of a control valve 72, Figs. 4 and 11, the other side of which is connected by a conduit 73 to the inlet 67h of the valve 67.

The valve 67 has two outlets 67C and 67d, Fig. 1l. The outlet 67e is connected by a conduit '75 to one leg of a T-titting 77. Another leg of the T-tting 77 is connected by a conduit 78 to the inlet side of a low pressure regulator 79. The outlet side of the pressure regulator 79 is connected by a conduit 81 to one leg of a T- iitting 82. Another leg of the T-iitting 32 is connected by a conduit S3 to the inlet side of an electrically controlled solenoid valve 84, which is normally closed and is open only when the solenoid thereof is energized. The outlet side of the valve 84 is -connected by a conduit 8S, a T-fitting 86, a conduit S7, a T-titting S8 and a conduit 89 to a low pressure air pressure gauge 91, which affords means for checking the pressure in this portion of the air line so that it may be kept within the proper limits by adjustment of the pressure regulator 79.

A water valve 31C, Figs. 4 and 1l, is connected at its inlet side to the water valve 31 by `a conduit 134, and at its outlet side by a conduit 136 to the water nozzle 31h. The valve 31e is of the normally closed type which may be opened by air pressure and, for this purpose, is connected by a conduit 93, having an air-flow control valve 94 therein, to the T-fitting 8S, Fig. 11.

A steam valve 32C, Figs. 4 and 1l is connected at its inlet side to the steam valve 32 by `a conduit 138, and at its outlet side by a pipe 137, and a flexible hose 139 to two pipes 125 and 126, on the ends of which are mounted the steam nozzles 32h .and 32s. The steam valve 32C, like the water valve 31C, is of the normally closed type which may be opened by air pressure, and for control purposes, is connected by a conduit 92 to the T-iitting 86, Fig. ll.

A third -leg of the T-tting S2, which, it will be remembered, is connected in the air line between the pressure` regulator 79 and the solenoid valve' 34, is connected by a conduit 96 to one leg of a T-iitting 97, Fig. ll. Another leg of the T-iitting 97 is connected to the front endportion of an air cylinder 99. The third leg of the T -fitting 97 is connectedby a conduit 191 having a check valve 152 therein, to the third leg of the T-iitting 77, which, it will be remembered, is yconnected in the air line between the pressure regulator 79 and the outletr67c lof the valve 67. The check valve 152 is of the type permitting the (flow of air from the T-iitting 97 toward the T-litting 77,` Y but preventing reverse'flow of air therethrough. Hence,

it will be seen that the conduitlt]` affords, in effect', a

vpressure release system for the! circulation offair from vthe conduit 96 back-into the conduitQ'ZSand 7.8,.when

"6 the pressure in the conduits 96 or 98 is above that in the conduits 75 and 78.

The air cylinder 99 is mounted in the housing 26 with the piston 99a thereof projecting outwardly away from the other carriage 22 or 23, Fig. 4. The free end portion of the piston 99a is pivotally connected by a pin 194 to the central portion of an elongated lever 106 which is pivotally mounted at one end by a pin 107 on a supporting bracket 108 in the housing 26. The other end portion of the lever 106 is pivotally connected by a pin 169 to one end of an elongated slide or carriage 110 which yis slidably mounted for horizontal longitudinal reciprocation relative to the housing 26 between two pairs of grooved rollers 112 and 113, Figs. 4 and 5.

An electric motor 115 is xedly mounted on the carriage 110 for reciprocation therewith, and the drive shaft 115e thereof is connected by a chain 117 to a gear 11S mounted on, and secured to, one end portion of an elongated shaft 119, Figs. 4 and 5. The shaft 119l is suitablyi journalled in supporting brackets 121 mounted on the slide 119, and the brush 41 is secured to the other end of the shaft 119 for rotation therewith. The brush 41 is preferably of the type having a substantially diskshaped back 41a with bristles 411? made of suitable material such as, for example, steel wire, nylon, or the like, projecting from one face thereof in a substantially annular shaped row at the outer peripheral edge portion of that face. The other face of the back 41a is secured to a mounting disk 123 mounted on the end portion of the shaft 119 projecting from the housing 26.

As best seen in Figs. 4 and 5, the pipes 125 and 126, to which the steam nozzles 32h and 32s are connected, are also mounted on the slide 119 and extend longitudinally thereof, on opposite sides of the shaft 119, below the motor 115. The pipes are secured in the mounting brackets 121, and, there-fore, are movable longitudinally with the slide 110. f

When air is `fed under pressure from the outlet 67C to the control valve 67 through the conduit 75, the T-iitting 77, the conduit 78, the pressure regulator '79, the conduit 81, the T-fitting 82, the conduit `96, the T-tting 97, and the conduit 98, into the front end portion of the .air cylinder 99, this is effective to move the piston 99a inwardly into the cylinder 99 to thereby pivot the lever 196 around the pin 107 in a counterclockwise direction as viewed in Fig. 4 and thereby move the slide 116 inwardly toward the other carriage 22 or 23, or to the right as viewed in Fig. 4. This movement of the slide 4111i is effective to move the motor 115 and the shaft 119 inwardly, to thereby dispose the brush 41 in position to engage the bristles 4117 thereof with the side wallsy of the` tire, and the adjacent portionof the rim, of the wheel rwhich is disposed in pushing relation to the arm 36 on the respective carriage 22 or 23. The steam nozzles 32h and 32s, on each side of the brush 41, are likewise advancedA with the slide 110 toward the wheel to be washed;` l

i The ends of the .nozzles 32h and 32s do not project from the housing 26 as yfar as the brush 41, but are so disposed that, when they are in fully projecting position, they are The operation of the switch 131 is such that when the control 4lever 131a is disposed in forwardly extending position `vas shown in solid lines in Fig. 4A, the lswitch 131 is in olf position and the motor is, therefore, not energized. When the lever 13111 is disposed' in' `full 'downwardly projecting position such as shown in broken lines in Fig. 4A, thefswitch is closed and the motor 115 is energized;

A bracket 132vis mounted in the housing 2.6 in position to. underlie the lever 131a1-a'nd hold the same: in closed .position whenthe motor 1115 and the slide 11017.21@ .(,is-v

posed in fully retracted position as shown in Fig. 4. When the slide 110 is moved outwardly by the air cylinder 99, as previously described, the arm 131:1 of the switch 131 rides ott `from the bracket 132 and is thus permitted to drop downwardly into switch-closing position to thereby energize the motor 115. Thus it will be seen that when the slide 110`is moved outwardly into forward position to engage the brush 41 with the side of a wheel of a vehicle to be washed, the motor 115 is energized and is thereby eiective to rotate the brush 41,

As best seen in Fig. 12, each of the motors 115 on the carriages 22 and 23 isrconnected by conductors z201, 2112 and 203, a starter S, and conductors 205, 206 and 207 to suitable power lines'such as the lines indicated at 209, 210, and 2111. Each starter unit S embodies three pairs of normally open contacts 214, 215 and 216, and the operating coil 218 of a conventional electro-magnetic relay which, when energized, is effective to close the contacts One side of the contacts 214-216 is connected to the conductors 201-203 by suitably `fused conductors 211, 222, and 223, respectively, and the other side of the pairs of contacts 214-216 are connected by suitable conductors 225, 226 and 227 to the conductors S-207, respectively. A normally closed, manually operable master control switch M may be connected in the conductors 22S-227 to afford means `for completely disconnecting the starter S and the motor 1115 from the power lines 209-211, if so desired.

One side of the coil 213 is connected to the power line 210 by a conductor 229 connected to the conductor 226. The other side of the coil 218 is connected by a conductor 231 to one contact 233 of the switch 13-1 on the motor 115, Fig. l2. The other contact 234 of the switch 131 may be connected to eitherone of the other power lines 209 or 211. It will be remembered that when the motor 115 is `disposed in retracted position in the housing 26, the switch 131 is held open by the bracket 132. When the switch 131 is in this position, the contacts 233 and 234 are open so that the circuit to the coil 21S of the starter S is not energized and, therefore, the pairs of contacts 214-216 are in open position so that the motor 115 is not energized. When the switch 131 is closed, and the contact 2134 is connected to Veither one of the power lines 209 or 211, this is effective to energize the coil size 218, to thereby close the pairs of contacts 214-216 and energize the motor 115;

Normally, when our'novel wheel wash-er 20 is in operation it will be used with a vehicle washing unit wherein the vehicle to be washed is pulled therethroughr by a suitable electric motor such as the motor 240, l2. The operation of which may be manually controlled by a suitable switch such asa stop-start push button switch SW, Fig. 12'. The switch SW has two pairs of contacts 242 and243, and 244 and 24S. Two spring urged contact plates 247 and 248 are mounted in the switch SW,

the contact plate 247 being manually movable into engagement with the contacts '242 and 243 but being normally ydisposed in open position relative thereto, and the contact plate 24S beingvnormally disposed in closed position relative to the contacts 244 and 245 but being manually movable into open position relative thereto.

The motor-.240 is connected by three conductors 251, 252, and 253, a starter S1, and three conductors '255, 256 and 257 to the power lines 209-211, respectively. The starter S1 embodiesfour pairs of normally open contacts 259, 260, 261, and'262, and an operating coil 264 which, when energized, is operable to`close the pairs of contacts 259-262. One side of the contacts 26d-262 is connected 'to the conductors 251-253, respectively, and thus to the motor 240. The other side of the contacts lconnected by the conductors 255-257, respectively, to the power lines 209-211. l

to'k the power line 210 by av conductor 266 connected to the 261B-262 are` by a conductor 268 to the contact 242 of the switch SW. The conductor 26S is also connected by a conductor 269 to one side of the normally open contact 259 of the starter S1. The other side of the contact 259 is connected by a conductor 271 to the contact 243 of the switch SW. rEhe conductor 271 isv also connected to the contact 245 of the switch SW by a conductor 272. The contact 244 of the switch SW is connected to the power line 209 by a conductor 274 which is connected to the conductor 255. It will be seen that with the contacts 259-262 of the starter S1 in open position, and with the contacts 247 and 24S of the switch SW disposed in normal position, as shown in Fig. 12, the motor 240 is not energized. However, when it is desired to start the motor 240, the contact 247 may be manually depressed into engagement with the contacts 242 and 243 and the switch SW. When this occurs current will flow from the powerV line 209 through the conductor 255, the conductor 274, the contacts 244, 248 and 245 of the switch SW, the conductor 272, the conductor 271, the contacts 243, 247, and 242 of the switch SW, and the conductor 268 to one side of the coil 264, and then through the coil 264, the conductor 266, and the conductor 256, to the power line 210. This, it will be seen, is effective to energize the coil 264 and thereby close the pairs of contacts 259-262. The contact 274 may then be released by the operator and permitted to move into open position relative to the contacts 242 and 243. This movement of the contact 247 is ineffective to open the circuit to the motor 240 because'upon energize.- tion of the coil 264 a holding circuit therefor has been etected through-the pair of contacts 259. This holding circuit, extends from the power line 209 through the conductor 255, the conductor 274, the contacts 244, 248 and 2,45 of the switch SW, the conductor 272, the pair of contacts 259, the conductor 269, the conductor 268, the coil 264, the conductor 266, and the conductor 256 to the power line 210. When it is desired to stop the motor 240, this may be readily accomplished by momentarily manually moving the contact 248 out of engagement with the contacts 244 and 24S of the switch SW to thereby break this holding circuit. When this occurs, the starter coil 264 becomes de-energized and, therefore, permits the pairs of contacts 259-262 to open so that the circuit to the motor 240 through the contacts 260-262 is broken.

The contact 234 of the switch 131 on each of the wheel washer motors 115 is connected to the starter S1 of the motor 240 in such a manner as to insure that if the motor 240 is de-energized so that the automobile being pulled thereby should stop its forward'movement, the motors One Vside of the coil^264 cnt-the starter S1 is connected.

are likewise de-energized so that the brushes 41 do not continue to scrub a stationary portion of a wheel on the vehicle, in the event that such stopping of the motor 240 occurs while a wheel was being so scrubbed. As illustrated in Fig. 12, we prefer to accomplish this by connecting the contact 234 of each ofthe motors 115 by a conductor 276 to a conductor 278 connected to the conductor 263 extending between the coil 264 of the starter S1 and the contact 242 of the switch SW. With this` connection it will be seen that when the coil 264 of the starter S1 for the conveyor motor 240 is connected to the power line 209 by either the starting circuit or the holding circuit, the contact 234 of the switch 131 is likewise so connected to the power line 269. However,'when the coil 264 of the starter Si is disconnected from the power line 209, the contact 234 of the lswitch 131 is likewise disconnected` from that line. Hence, it will be seen that only when the conveyor motor 240 is operating and, therefore, is effective to `advance a vehicle through the wheel washer 20, can the motors'115 lne-energized, so there is no danger that the motors 11S will continue to operate'after the conveyor motor 240 has stopped` and thereby cause the brushes`41 to scour, and possibly damage, astationary part jof a wheel Yor tire` passing through our wheel washer 20. Y

` Also', iis-shown 'in Fig. the operating' coilof the` solenoidvalvelSAfn each vof,the,carriages. 22,.,and'23 is reversible air motor 151.

connected across two of the power supply lines 201 and 202 of the motor 115 in that carriage 22 or 23 by conductors 281 and 282, respectively. Hence it will be seen that the coil of the solenoid valve 84 in each carriage 22 and 23 is energized only when the motor 115 in that carriage is energized so that the water valve 31c and the steam valve 32C in the carriage is open only when the motor 115 is operating. Hence, if the motors 115 in either of the carriages 22 and 23 are stopped during a wheel washing operation because of the stopping of the conveyor motor 240, it will be seen that the solenoid valves 84 `are thereby closed to shut olf the flow of air under pressure to the valves 31e and 32C, and thereby permit the valves 31e and 32C to close so that the flow of water and steam from the nozzles 31h, and 32h and 3 respectively, is stopped.

We have seen that when the vehicle is pushing forwardly on the arms 36 on the carriages 22 and 23, the plunger 67a of each of the valves 67 is held in full forward position by the adjacent bracket 36e. This position of the plungers 67a is etfective to cause air to be fed from the outlets 67C of the valves 67 to the cylinders 99 to thereby move the brushes 41 and nozzles 32b and 32s out into washing position; and, when the motors 115 are energized, to feed air through the solenoid valves 84 to thereby open the water valves 31C and steam valves 32C and cause water and steam to be ejected directly against the wheels to be washed.

It will be remembered that, when the carriages 22 and 23 approach the front end of the tracks 24 and 25, the valves 49 are actuated by the cam tracks 63 to thereby cause the arms 36 to swing forwardly into substantially parallel relation to the tracks 24 and 25, as shown in broken lines in Fig. l. When this occurs, the arms 36 are released from the pressure of the wheels of the vehicles, and the springs 67e on the valves 67 again move the plungers 67a into full outwardly projecting position so as to close the outlets 67C and open the outlets 67d.

When the plunger 67a of the control valve 67 in either carriage 22 or 23 is disposed in such position as to close the outlet 67C and open the outlet 67d, it will be seen that air under pressure is fed from the outlet 67d through a conduit 144, one leg of a T-tting 145, a conduit 146, having an air flow control valve 14,7 therein,. to the rear end portion of the air cylinder 99 to thereby cause the piston 99a thereof to be moved into outwardly projecting position relative to the air cylinder 99. This outward movement of the piston 99a is effective to pivot the lever 106 in ak clockwise direction around the pin 107, as viewed in Fig. 4, to thereby move the slide 110 outwardly away from the other carriage 22 or 23, or to the left as viewed in Fig. 4, and thereby move the slide 110 and the motor 115 back into normal, at rest position as shown in solid lines in Fig. 4. This movement of the slide 110 and the motor 115 is eifective to retract the brush 41 from its engagement with the wheel being washed, and it will be remembered, this outward movement of the motor 115 is effective to engage the the atmosphere.

One of the other legs of the T-tting 145, which` is rvconnected by the conduit 144 to the/outlet 67d`o'r` the? valve 67, is connected by a conduit V149 to one side of a I motor 151 is connected by a conduit .1.52 t'o a valve 153 mounted in the housing-22a adjacent to, the/pre'viously i mentioned valveffl-Z: The other sidefotzthe'valveL-ISS isfv 23 arenormally disposed in fullrearward `and 23 asfshown thereby, and a sprocket 151b is secured to the drive shaft 151:1. Each sprocket 151b is drivingly connected by a chain 161 to a sprocket 163 secured to a shaft 164 journalled in the housing 26. Another sprocket 165 is mounted on the shaft 164, for rotation therewith, and is disposed between and in radial alignment with two sprockets 167 and 163 mounted on shafts 169 and 17d, respectively, journalled in the housing 26.

Two sprocket chains 172 are mounted in the tracks 24 and 25, respectively, and extend between the front ends 39 and the rear ends 38 thereof along the paths of travel of the sprockets 165, 167 and 168 in the carriages' 22 and 23 along the tracks 24 and 25. Each of the chains 172 is trained over the gear 165 and under the gears 167 and 168 in the respective carriages 22 and 23.

When either motor 151 is being driven by air flowing from the valve 67 toward the valve 153, the drive shaft 151a is rotated thereby in a clockwise direction, as viewed in Fig. 4, so that the sprocket 165 is likewise driven in a clockwise direction and the carriage 22 or 23 is moved rearwardly thereby along the respective chain 172.

Each of the valves 153 connected to the air motors 151 embodies a spring urged plunger 153a which projects downwardly therefrom and which, when disposed in full downwardly projecting position is effective to open the valve 153, and when disposed in raised position is effective to close the valve 153. The plunger 1530 is spring urged toward valve opening position. The Valve 72 is of the same construction as the valve 153.

At the rear end portions of the tracks 24 and 25 cam plates are mounted in the outer corners thereof, Figs l, 8 and 9. The cam plates 155 embody a horizontally disposed top wall 1550 supported on vertically disposed flanges 15519, Figs. 8 and 9. Two forwardly and downwardly sloping ears 155C and 155d project forwardly from the top wall 155g of each of the cam plates 155, the leading edge of the ear 155d projecting forwardly ahead of the leading edge of the ear 155e. The i' of the plungers on the valves 72, and the ears 155d disllaged in the path of travel on the plugers on the valve Hence it will be seen that as the carriages 22 and 23 are moved forwardly by a Vehicle to be washed, the plungers on the valves 72 and 73 moveforw'ardly off from the cam plates 155 to thereby open the valves 72 and 153. During return movement of the carriages 22 and 23, the plunger on the valves' 72 and 73 Aride forwardly along the ears 155e` and 1550.', respectively, back on tothe top wall 155a of thecam plates 155 Ato thereby close the valves 72 and 153. inasmuch/as the ear 155d is disposed forwardly of the ear 155C,4 the valves 153 are closed priorto the valves 72 for a purpose which will be discussed in greater detail presently. Ina typical operationof our` novel wheel washing device, the valves 31, 32 and'33. on both of the carriages 22 and 23 are manually opened. The carriages `22 and position on the tracksl 24-'and 25,V as shown in solid lines in Fig. `lt.

will be Vremembered that when the carriages v22and 23 j are disposed in this position, and` noirvehicl'e -ispressing The .otherside ofthe -air against ,thegarms736, Vthe-farms 'A36 project4 substantial,,l f ,-perperidicularly outwardly ,from 'the Acarriages k22 1'1` position so that air is fed from the line 33a through the valve 49 and the conduit 47 to the rear end of the air cylinder 45, to thereby hold the arm 36 in the aforementioned outwardly projecting position.

At this same time, air under pressure is fed from the line 33a to the inlet of the Valve 72. Inasrnuch as the plunger of the valve 72. isheld in raised position by the cam plate 155, this valve is closed to thereby prevent the flow of air through the conduit 73` to the valve 67.

When a vehicle moves through fthe washing unit in the normal forward direction, which is from left to right as viewed in Fig. 1, the front wheels thereof engage the arms 36 and move 4the carriages 22 and 23 forwardly along the tracks 24 and 25. The pressure of the wheels of the vehicle forwardly on the arms 36 cause the arms 36 to pivot forwardly with the brackets 36e around the pivot pin '65 into a forwardly disposed position as shown in broken lines in Fig. 4. This movement of the arms 36 and the brackets 36e is effective to press the plunger 67a inwardly into full-y depressed position. When the plunger 67a is disposed in this position, the outlet 67d of the valve 67 is closed and the outlet 67C is open. As the carriages 22 and 23 move forwardly on the tracks 24 and 25, the plungers on the valves 72 and 153 ride off from the cam plates 155. Hence, both valves 72 and 153 in each of the `carriages 22 and 23 are permitted to open. The opening of valve 72 permits air, under pressure, to flow from the valve 72 to 'the inlet 67h of the valve 67. From the valve 67, the air Hows out through the outlet 67e, which is now open, through the conduit 75, the T- fitting 77, the conduit 78, the low pressure regulator 79, the conduit 81, to the T-fitting 82. From the T-fitting 82, air ows into the front end portion of the air cylinder 99 to thereby move 'the piston 99a thereof inwardly and cause the slide 110 to be moved outwardly to thereby engage the brushes 4-1 with the sides of the Wheels to be washed. As previous-ly explained, the movement of the motor 115 with the slide 110 opens the switch 131 thereon to thereby energize the motor 115 and cause the brush 41 to be rapidly revolved so that it effectively scrubs the side walls of the `tires on the wheels to be washed. Also, the energizing of the motor 115 is effective to energize the coil of the solenoid valves 84 to thereby open the valves S4, so that, in addition to air being fed from the T-fitting S2 to the air cylinder 99, air is fed from the T-titting 82 to the water valve 31C and lthe steam valve 32e to thereby cause water and steam to be ydischarged from the water nozzle 3117 and the steam nozzles 32h and 32s, respectively. Y

As the vehicle continues to advance through the Washing unit 20, the wheels thereof maintain the forward pressure on the arms 36 to thereby keep the plunger 67a of the valve 67 depressed so that the brush 41 is rotated by the motor 115, water ows fromthe nozzle 31b, and steam isdischarged from the nozzlesr32b and 33b.

As the carriages 22 and23 approach the forward end portions of the tracks 24and 25, Vthe rollers 49d on the valvesli,l enf-'age Ithe cam tracks 63 andare thereby pulled Fdownwardly to thereby press the plunger 49a upwardly into full upward position inthe valves 49. This movement of the plunger 49a shifts the valve 49 sonas to close the conduit 47 and open the conduit 45 toV thereby feed air into the front vend portion of thel cylinder 45 and cause the arms 36 to be pivoted forwardly aro/undV the pivot pins 36d into a forwardly projecting position, as shown in broken lines in Fig. l This forward movement ofthe arms 36 releases the pressure on the plungers 67arof the vali/e6)l 'so that the plungers '67g are Ymoved outwardly by lthe springs 67e into full outwardly'projectingY position. to thereby closethe outlet-67e ofthe valve 67 and open'theoutlet 67d. Closure of the outlet` 67e cuts'off The closure ofthe outlet 67e` of the valve 67 is also eiective to cut off the air pressure to Ithe front end portion of the air cylinder 99 and, inasmuch as the outlet 67d of the valve 67 is now open, the air under pressure flows from the outlet 67d into the rear end portion of the air cylinder 99 to thereby cause the arm 67a to be moved outwardly from the air cylinder 99. This movement of the piston 99a causes the slide 110 to be moved back into normally retracted position as shown in solid lines in Fig. 4, and when the arm 13161 rides on to the bracket 132, the switch 131 is closed to thereby deenergize the motor and stop the rotation of the brush 41. While the slide 110 is being retracted by the air pressure fed from the outlet 67d of the valve 67, air is also fed from the outlet 67d of the valve 67 to the air motor 151. The valve 153, which is connected to the other side of the air motor by the conduit 152, being open, the air from the conduit 149 is permitted to flow through the air motor and thence through the conduit 152 and the valve 153 to the atmosphere. This ow of compressed air through the air motor 151 is effective to rotate the gear 151b, and move the carriage Z2 or 23 rearwardly along the chain 172, as previously explained.

As the carriages 22 and 23 are thus moved rearwardly by the air motor 151, the arms 36 are moved back past the wheels of the vehicle with which they were formerly engaged. Thereafter, the rollers 49d on the valves 49 engage and ride upwardly on to the cam tracks 61, Fig. 6, to thereby pull the plunger 49a of the valve 49 outwardly into fully extended position. This movement of the plunger 49a is effective to close the outlet to the conduits 4S connected to the valve 49, Fig. 11, and open the outlet tothe conduits 47 to thereby cause the plunger 45a of the air cylinder 45 to be moved outwardly and thus swing the arms 36 around the pins 36d in a clockwise direction, as viewed in Fig. 1, into fully extended position' as shownin 4solid lines in Figs, 1 and 4.

The movement of the carriages 22 and 23 rearwardly along the tracks 24 and 25 by `the air motors 151 is quite rapid. As the carriages 22 and 23 approach the rear end portions of the tracks 24 and 25, the plu-ngers 153a of the valves 153 ride upwardly on to the cam plates 155 to thereby close the valves 153. This it will be seen is effective to stop the iiow of air through the air motors 151. However, inasmuch as the air pressure in the conduit 152 must build up before it is elfective to stop the air motor completely, the stopping thereof is somewhat gradualV and the conduits 152 and the valves 153 act somewhat as an air brake which is effective to cushion the stop of the air motors 151 and, therefore, of the carriages 22 and`23.V As the carriages 22 and 23 are coming to a stop,`the plungers of the valve 72'move upwardly on to the cam plates 155 to` thereby close the valves 72 and completely shut of the flow of` airfrom the air line 33a to the air valve 67. This completes a Vcycle of operation-of our novel car washer, and the c arriages 22 andV 23`are now disposed inrnormal at rest position, wherein they are in position to have the arms 36 thereof engaged by the next pair of vehicle wheels moving through the car washer or thereby commence another icomple'te cycle of operation.

lFigs. 13-15 illustrate a modified embodiment of the v invention which affords some additional operating advantages. In many respects, the washing device illus- :trated in Figsf 13-15 is essentially 'similar to that of the lpreviously described apparatus;l accordingly, wherever possible, similar elements and members have been identied with the same reference numerals as in the construction of Figs. 1412, despite the fact that the location of the elements within the physical structurev of thewash-` 'ing device lmay have been changed'. f f, The washingV device 23; shown in Fig; 13 lis essentially similar-to-thedevice-22*as illusjtrateclin` Fig.V i .andcomprises a Afragn'e 26 which is supportedby'the wheels'Zi and *.283i1p'oriv4 suitable'. rails 'suchasI'itheLrails 25 ingEigd. Y

As in the previous embodiment, the washing device 23 is provided with suitable manually operable valves 31, 32, and 33 for connection to the water, steam, and air conduits of the washing system. In addition, an electrical junction box may be provided, but is not illustrated in Fig. 13. The carriage 23 of Fig. 13 also embodies the pusher larm 36 which projects into the path of a vehicle being washed and is engaged by a wheel of the vehicle to drive the washing device along the rails during the washing operation. As in the previously described embodiment, the pusher arm 36 is preferably provided with a roller 36a to minimize friction between the pusher arm and the vehicle wheel.

As before, the end of the pusher arm shaft 36b opposite the roller 36a is pivotally mounted, as by a yoke 36C and a pin 36d, on the outer end of a support bracket 36e. An arm 43 is affixed to the yoke 36e and is connected to the piston 45a of an air cylinder 45 incorporated in the washer unit.

The washer unit 23 is provided with a water nozzle 31b which projects from the frame 26 toward the vehicle being Washed and which is connected to the water inlet valve 31 through an air-operated water control valve 31C. The washing unit is also provided with two steam spray nozzles 32b and 32s which are connected to the steam line inlet valve 32 by a suitable cond-uit in which an airoperated steam control valve 32e is interposed. The two nozzles 32b and 32s are disposed on opposite sides of a brush 241 which is aixed to one end of a shaft 219, the other end of the shaft 219 being connected to an electrical motor 215 by means of a flexible coupling 220. As in the previously described embodiment, the steam nozzles, the brush, the motor, and the shaft interconnecting the motor and the brush are all supported upon a carriage which is guided for movement transversely of the washing unit by the grooved rollers 112 and 113. Thus, the steamnozzles 32h and 32s and the brush 24.1` may effectively be moved toward and away from engagee ment with the wheel of a vehicle being Washed.

The motor 215 employed in this embodiment of the invention is somewhat different from the motor 115 of the first-described embodiment in that it comprises a selfcontained gear motor, thereby eliminating the speedreduction drive illustrated in Fig. 5. With this type of motor, a flexible coupling such as the coupling 220 is preferred, since it is desirable to avoid any undue strain upon the motor which might otherwise arise from misalignment between the motor shaft and the brush shaft 219.

There is another and highly important diference between the motor and brush mounting arrangement of this embodiment of the invention and that desired in connection with Figs. l-i12.l As illustrated in Fig. 14, the brush shaft 219 and the motor 215, together with the brush 241,

-`are inclined at an acute angle to the horizontal, so thatl the brush faces somewhat downwardly as well as outwardly of the washing device. Preferably, the angle Vof inclination of the brush drivingapparatus with respect to the horizontal is approximately fteendegrees, although this may be varied by as much as five` degrees in either direction. This inclination of the brushand ybrush 'drive apparatus is .highly advantageous in the cleaning of `the side Walls ofV a tire such as vthe tire 242 illustrated in i' Section iniFig. 14. This apparently minor change results jin a marked increase in theeiciency ofthe washing 14 oiler to the T-titting 58, which in turn is connected to the air control Valves 49 and 67 by the conduits 59 and 73 respectively. In this embodiment, it will be noted that the independent shutoff valve 72 utilized in the arrangement shown in Fig. l1 is not employed.

The two outlet ports of the pusher arm control valve 49 are connected to the opposite ends of the air cylinder 45, suitable air flow controls being provided within the connecting lines 47 and 48. The air cylinder 45 controls the retraction of the pusher arm 36 at the end of the washing cycle as described above in connection with the embodiment of Figs. 1-12, the piston 45a of the air cylinder being connected to the yoke arm 43.

The rst outlet port 67C of the air control valve 67 is connected by the conduit 75 through the two T-ttings 277 and 282 to a regulating valve 281i. The outlet port of the regulating valve is connected through the solenoidoperated interlocking valve 84 to the two air-operated water and steam control valves 31c and 32e. The T-tting 277 affords a means `for connecting the air conduit 75 to the ram pressure regulator valve 279, the outlet port of the regulator being connected to the brush carriage actuating air cylinder 99. As before, the inlet port on the air cylinder 99 connected to the regulator 279 is also returned to the air line 75 through the check valve 1412, which connects into the T-itting 282.

The remaining outlet port'67d of the ram air control valve 67 is connected to the T-itting 145 which in turn is connected to an air motor 251 by means of a conduit 149 in which a check valve 252 is preferably interposed. The outlet port of the air motor 251 is connected to the brake valve 153; in this embodiment, ya speed-control valve 253 is preferably interposed in the conduit 152 connecting the air. motor to the brake valve. The T-tting 145 is also connected to the air cylinder 99 as before; a rapid release valve 247 is interposed in the connecting line 146 in addition to the air flow control device 147. The operation of the pneumatic control system, as described hereinafter, may best be understood by considering the schematic diagram of Fig. l5; the physical disposition ofmany of the operating elements is indicated in Fig. 13.

The operation of the embodiment of Figs. 13-15 is in many respects'essentially similar to that of Figs. 1-12; accordingly, only a brief review of the operational characteristics and a consideration of the differences between the two embodiments is included herein. When the Ywasher device is placed in operation, the water, steam,

and air valves 31, 32, and 33 are manually opened and the carriage is disposed in its initial or rearward position as shown in solid lines in Fig. 1. As before, the pusher arm 36 is in the position indicated in Fig. 13 and the arm is maintained in that position by air supplied to the air cylinder 45 throughl the pusher arm control val-ve 49.

When a vehicle engages the pusher arm 36, it moves thecarriage of the washer device forwardly along the tracks (Fig. l) and at the same time pivots the pusher arm l36 forwardly around the pivot pin 65, the displacement of the pusher arm being limited to a relatively small angle as described hereinabove in connection with Fig. 4. This pivotal movement of the pusher arm 36 effectively actuates the ram air control valve 67 to open the outlet port67c and close theport 67d. `Under these con,-

devric'erandproduces much more satisfactory results than can be' achieved with any arrangement in which the brush fface'extends'approximately vertically, Y.

The pneumatic control. `arr;angement`forrthe Washing u'nit of the embodiment of Figs. 13915 is also'somewhat different fromthat of Figsfl-lll As indicated in Fig.`- 1 5, P A' the' air inlet conduit 33a is 'connected inrseries tothe in'- K `vIet'valve 33, the'air lter 52, thepair press-ure yregulator 54;.and the air" line oiler 56yby meansfof r,the conduitsl,

ditions, air is supplied under pressure to the `.air cylinder 99, which operated to drive the slide supportingtthermotor 215 toward the vehicle, bringing' thev brush 241 into en- ,f gagement with the wheelv of, the vehicle. This same operation of the air cylinder A99 also actu'atesa motor control jswitch 231 which energizes the motor-i215 to rotate the` scrub the sidewall ofthe tire l242 "(Fig. y 14). Thefswitching ldevice 231 also energizes thecoil of therinterlocking solenoid valve tijd".A Consequently, air is,

fed to the 'waterland steam control valves 31d andL 32e; openingthose valves anddischarging water and'` steam' from the `v vz'iter lnozzle 53111 andt'he steamfnozzles- 32!) v and 32s respectively. "Continued movement lofthe vehicle brush 241 and vtive in` operation.

'15 maintains these operating conditions for `a substantial period of time suiicient to permit washing of the entire periphery of the tire 245.

When the washer carriage nears the forward end of the track, the cam-operated pusher arm control valve 49 is actuated as described hereinabove to close the conduit 47 and open the conduit 4S. This reversal of the air input to the cylinder 45 causes the pusher arm 36 linked thereto to be pivoted forwardly to a position clear of the vehicle. The forward movement of the pusher arm actuates the control valve 67, closing the outlet 67e and opening the outlet 67d. This operation eiectively shuts oi the ow of water and steam by closing the two pilot valves 31C and 32C. Actuation of the valve 67 also cuts ot air pressure to the one end of the air cylinder 99 and admits air under pressure through the lines 144- and 146 to the opposite end of the air cylinder. This reversal of the air connections to the cylinder 99 causes the slide supporting the motor 21S and the brush 241, along with the steam outlet nozzles,to be moved into the initial or retracted position illustrated in Fig. 13. When the return movement of the brush and motor is completed, the electrical control switch 231 is actuated to de-energize the motor 115 and also to close the solenoid-actuated valve 84.

Opening of the port 57d of valve 67 also causes air to be fed under pressure through the conduits 144 and 149 and the check. valve 252 into the inlet port of the air motor 251. Because the brake valve 153` is open at this stage of operation, the pneumatic circuit is complete to the atmosphere and the compressed air drives the air motor, to rotating the gear train connected thereto and moving the carriage 23 to its initial position as described above, for carriage 22, in connection with Fig. 4.

As the carriage returns toward its initial position, the cam-controlled valve 49 is again actuated, closing the outlet to the conduit 4S and opening the outlet to the conduit 47. As a consequence, the air input to the pusher arm operating cylinder 45 is again reversed and the air cylinder operated to swing the arm 36 back to its fully extended position as illustrated in Fig. 13. The valve 153 serves as a brake on the rearward movement ot the carriage in the manner described hereinabove. i

The speed control valve 253, which is incorporated in the conduit 152 linking theV air motor 251 to the brake valve 153 (Fig. 15) may be utilized to limit the amount of air flowing through the air motor and thereby prevent excessive speeds in the return movement ofthe washer carriage. The rapid release valver247 incorporated in the conduit 146, on the other hand, which is provided with a vent 248, facilitates rapid bleeding of air under pressure from the cylinder 99. In this way, the release valve 2.47

permits relatively quick and expedient conditioning of the system for a washing operation whenever` the carriage is returned to its initial or rearward position. The use of the two regulating valves 279 and 281i instead of the single regulating device 79 of the embodiment or" Fig. 11 allows the use of diierent operating pressures for the air cylinder 99 and the pilot control valves 31e, and 32C. This arrangement is not particularlyv important V.but atiords more freedom in selection of pneumatic components,

since the design requirements for the air cylinder are not dictated by the pressure requirements for Vthe pilot valves and vice versa. v A

It will thus be-.seen thatthe washing devices ofthe invention effectively and expeditiously clean each wheel of a vehicle as the vehicle advances past thewashing device',

Steam andwater areapplied to thesidesfot'the wheels( Thus, while we have illustrated and described the preferred embodiment of our invention, it is to be understood that this is capable of variation and modification, and we therefore do not wish to be limited to the precise details set forth, but desire to avail ourselves of such changes and alterations as fall within the purview of the following claims.

We claim:

1. A washing device for washing the wheels of a vehicle as the vehicle moves along a predetermined path of travel comprising two elongated tracks mounted on opposite sides of said path of travel in substantially parallel relation thereto, two carriages, each of said carriages being mounted on a respective one of said tracks and reciprocable therealong between a rearward and forward position, each of said carriages normally being disposed in said rearward position, two arms, each of said arms being pivotally mounted on a respective one of said carriages for movement between an outwardly projecting position and a collapsed position, said arms, when disposed in said outwardly projecting positions, projecting into said path of travel in position to be engaged by said wheels to be washed to thereby push said carriages along said tracks from said rearward position to said forward positions, said arms, when disposed in said collapsed positions, being disposed in substantially parallel relation to said tracks and out of said path of travel, actuating vmeans at said rearward positions on said tracks, other actuating means at said forward positions on said tracks, means mounted on said carriages for wetting and scrubbing said wheels during said movement of said carriages from said rearward position to said forward position in response to engagement of said wheels with said arms, means, including a valve mounted on said carriage and engageable by said other actuating means when said carriages are at said forward positions, for returning said carriages to said rearward positions, and means, including a valve vmounted on said carriage and engageable by said first mentioned actuating means when said carriages are disposed in said rearward positions, for stopping the movement of said carriages in said rearward positions.

2. A washer device for washing the wheels of a vehicle as the vehicle moves along a predetermined path of travel comprising two elongated tracksy mounted on opposite sides of said path of travel inl substantially parallel relation thereto, two carriages, each of said carriages being mounted `on a respective one ofV said tracks -and l reciprocable therealong between a rearward and forward position, each of saidcarriages normally being disposed in said rearward position, two arms, each of said arms being pivotally mounted'on a respective one of said carriages for movement between an outwardly projecting position and a collapsed positionfsaid arms, when disposed in said outwardly projecting positions, projecting intosaidpath of travel in position to be engaged by said wheels to be washed to thereby push said carriages along said tracks from said rearward position to said forward positions, said arms, Vwhen, disposed in said collapsed positions, being disposed in substantially parallelA relation to'said tracks andY out of said path of trave1,actuating means at said rearward: positions on said tracks, other Y actuatingy means at said forward positions on said tracks,

andtires, of the vvehicle, which` are simultaneously 'f scrubbed to remove any 'tenacious dirt which might otherwise adhere thereto. vThe washing unit A,quickly/andautomatically'returns to its `starting positionfup'on the cornjpletidn of each washing cycle. iThel washer unit kisrelavtively economical in `const'r'tjiction and isn extremely effecmeans for wettingl andvscrubbing said wheels during v said movement .ot said 'carriages from said4 rearward position to said forward position, and valve .means forcontrolling vthe operation ofsaid last mentioned. means,'said"valve means comprising vvalvesconnected to said arms andoperableby said arms, in response to engagement olisaid arms vby said` wheels, to eiect operation of said means, for

[said carriages Vand ,engagejable'with nsaid rst mentioned actuating means and connected rto said viirst mentioned lvalves, rfprfstopping operation 'of said rst mentioned valves when. Sdcarriages are disposed in saidrea'rwa'rd j 17 position, and means, including valves mounted on said carriages and engageable with said other actuating means when said carriages are in said forward position, for moving said arms away from said engagement with said wheels into said collapsed positions. j

3. A washer device for washing the wheels of a vehicle as the vehicle moves along a predetermined path of travel comprising two elongated tracks mounted on opposite sides of said path of travel in substantially parallel relation thereto, two carriages, each of said carriages being mounted on a respective one of said tracks and reciprocable therealong between a rearward and forward position, each of said carriages normally being disposed in said rearward position, two arms, each of said arms being pivotally mounted on a respective one of said carriages for movement between an outwardly projecting position and a collapsed position, said arms, when disposed in said outwardly projecting positions, projecting into said path of travel in position to be engaged by said wheels to be washed to thereby push said carriages along said tracks from said rearward positions to said forward positions, said arms, when disposed in said collapsed positions, being disposed in substantially parallel relation to said tracks and out of said path of travel, actuating means at said rearward positions on said tracks, other actuating means at said forward positions on said tracks, spraying means on said carriages for spraying a washing fluid against said wheels, brushing means on said carriages for brushing said wheels, valve means on said carriage in position to be operated by said arms for controlling the operation of said spraying means and said brushing means in response to limited pivotal movement of said arms when engaged by said wheels, other valve means mounted on said carriages and engageable with said first mentioned actuating means for controlling the operation of said rst mentioned valve means, and valve means mounted on said carriages and operable by said other actuating means for moving said arms into collapsed position when said carriages are disposed at said forward positions.

4. In a washer device for washing the wheels of a vehicle as the vehicle moves along a predetermined path of travel, an elongated track parallel to said path of travel, a carriage mounted on said track for reciprocation therealong between a forward position and a rearward position, means mounted on said carriage for wetting and scrubbing such a wheel during movement of said carriage from said rearward position to said forward position, an arm mounted on said carriage for pivotal movement relative thereto and normally projecting therefrom into said path of travel in position to be engaged by such a wheel moving along said path to thereby push said carriage from said rearward position to said forward position, means on said carriage and operable by said track at said forward position for swinging said arm out of said engagement with such a wheel into substantially parallel relation to said track, means connected to said rst named means and operable by said arm for controlling said lirst named means to effect actuation of said first named means when said arm is pushingly engaged aud pivoted to a limited extent by said wheel and to stop operation of said first named means when said arm is not so engaged by said wheel, and means on said carriage connected to said means operable by said track and controlled thereby to move said carriage from said forward position to said rearward position.

5. A washing device for washing the wheels of a vehicle as the vehicle traverses a predetermined path comprising a first carriage disposed adjacent said path and movable in a -direction parallel thereto, a second carriage supported on said rst carriage for movement between a retracted position spaced from said path and an operating position more closely adjacent said path, fluid application means mounted on said second carriage for applying fluid under pressure to a wheel of a vehicle moving along said path,

18 scrubbing means mounted on said second carriage at an acute angle with respect to the horizontal for engaging and scrubbing the vehicle wheel when said second carriage is in its operating position, and a pneumatic control system for controlling said second carriage, said fluid ap.- plication means, and said scrubbing means, said system including a control arm movably mounted on said car- .riage and engageable by the vehicle wheel, and control valve means connected to said second carriage, said fluid application means, and said scrubbing means and actuatable by limited movement of said control arm in response to engagement thereof by the vehicle wheel.

6. A washing device for washing the wheels of a vehicle as the vehicle traverses a predetermined path comprising a first carriage disposed adjacent said path and movable in a direction parallel thereto, a second carriage supported on said rst carriage for movement between a retracted position spaced from said path and an operating position more closely adjacent said path, fluid application means for applying uid under pressure to a wheel of a vehicle moving along said path, scrubbing means mounted on said second carriage for engaging and scrubbing the vehicle wheel, and a pneumatic control system for controlling said second carriage, said fluid application means, and said scrubbing means, said system including a control arm mounted on said carriage and engageable by the vehicle wheel and control valve means connected to said second carriage and said fluid application means and actuatable by movement of said control arm in response to pressure applied thereto by the vehicle wheel.

7. A washing'device for washing the wheels of a vehicle as the vehicle traverses a predetermined path comprising: a fir-st carriage disposed adjacent said path and movable in a direction parallel thereto, a second carriage supported on said rst carriage for movement between a retracted position spaced from said path and an operating position more closely adjacent said path, fluid application means mounted on said second carriage for applying fluid under pressure to a wheel of a vehicle moving along said path, scrubbing means comprising a rotary brush and drive means therefor mounted on said second carriage at an angle of approximately 15 degrees with respect to the horizontal for engaging and scrubbing the vehicle wheel, and a control system for controlling said second carriage, said fluid application means, and said scrubbing means, said system including a -control arm mounted on said carriage and engageable by the vehicle wheel, control valve means connected to said second carriage and said uid application means and actuatable 'by movement of said control arm in response to the application of force to said arm by said vehicle wheel, and a control device for energizing said brush drive means in response to movement of said carriage.

8. A washing device for washing the Wheels of a vehicle as the Vehicle traverses a predetermined path comprising: a first carriage disposed adjacent said path and movable in a direction parallel thereto, a second carriage supported on said first carriage at an angle of approximately 15 degrees to the horizontal for movement between a retracted position spaced from said path and an operating position more closely adjacent said path, uid application means for applying fluid under pressure to a wheel of a vehicle moving along said path, scrubbing means mounted on said second carriage for engaging and scrubbing the vehicle wheel when the second carriage is in its operating position, and a pneumatic control system for controlling said second carriage, said fluid application means, and

said scrubbing means, said system including a control arm mounted on said carriage and engageable by the vehicle wheel and control valve means connected to said second carriage and said fluid application means and actuatable by movement of said control arm responsive to engagement of said control arm by a vehicle wheel.

(References on following page) 19 References Cited in the le of this patent 2,718,650 2,761,170 H UNITED STATES PATENTS 2,814,825 2,692,214 Hurst Oct. 19, 1954 .2,716,767 Davis Sept. 6, 1955 2,716,772 Cockrell Sept. 6, 1955 497,422

20 Haverberg Sept. 27, 1955 Bonneau Sept. 4, 1956 Guthrie et a1 Dec. 3, 1957 FOREIGN PATENTS canada' Nov. 3, 1953 

